CVE-2026-41091
high
KEV
CVSS v3
7.8
CVSS v2
—
VIR risk
9.3
Description
Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally.
CISA KEV
- Vendor
- Microsoft
- Product
- Defender
- Due date
- 2026-06-03
Predictions
Exploit likelihood
99%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: cisa-kev — https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-41091 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41091
Vendor advisory: secure@microsoft.com — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41091
Mitigation details
Source: Microsoft Security Response Center · View original ↗ · proprietary-no-redistribution
Full prose not cached — VIR stores only structured fields (affected/fixed versions, references) for this source. Click "View original" above for the vendor's full advisory.
Affected
| Vendor | Product | Version |
|---|---|---|
| microsoft | Windows Server 2012 | |
| microsoft | Windows Server 2012 (Server Core installation) | |
| microsoft | Windows Server 2012 R2 | |
| microsoft | Windows Server 2012 R2 (Server Core installation) | |
| microsoft | Microsoft Excel 2016 (32-bit edition) | |
| microsoft | Microsoft Excel 2016 (64-bit edition) | |
| microsoft | Microsoft Word 2016 (32-bit edition) | |
| microsoft | Microsoft Word 2016 (64-bit edition) | |
| microsoft | Microsoft Office 2016 (32-bit edition) | |
| microsoft | Microsoft Office 2016 (64-bit edition) | |
| microsoft | Windows Server 2016 | |
| microsoft | Office Online Server | |
| microsoft | Windows 10 Version 1607 for 32-bit Systems | |
| microsoft | Windows 10 Version 1607 for x64-based Systems | |
| microsoft | Windows Server 2016 (Server Core installation) | |
| microsoft | Microsoft SharePoint Enterprise Server 2016 | |
| microsoft | Microsoft SQL Server 2017 for x64-based Systems (GDR) | |
| microsoft | Windows 10 Version 1809 for 32-bit Systems | |
| microsoft | Windows 10 Version 1809 for x64-based Systems | |
| microsoft | Windows Server 2019 | |
| microsoft | Windows Server 2019 (Server Core installation) | |
| microsoft | Microsoft Office 2019 for 32-bit editions | |
| microsoft | Microsoft Office 2019 for 64-bit editions | |
| microsoft | Microsoft SharePoint Server 2019 | |
| microsoft | Visual Studio Code | |
| microsoft | Windows Admin Center | |
| microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 | |
| microsoft | Microsoft .NET Framework 4.8 on Windows Server 2012 R2 | |
| microsoft | Microsoft .NET Framework 4.8 on Windows Server 2016 | |
| microsoft | Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems | |
Exploits
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| microsoft | malware_protection_engine | {"startIncluding":"1.1.26030.3008","endExcluding":"1.1.26040.8"} | 1.1.26040.8 |
References
CWEs
CWE-59
Verify integrity in audit chain (admin only). AS-IS.